<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <div id="main" style="width: 800px; height: 400px"></div>
    </el-card>
  </div>
</template>

<script>
// 导入echarts
import * as echarts from 'echarts'
import _ from 'lodash'
export default {
  data() {
    return {
    // 需要合并的数据
      options: {
        title: {
          text: '用户来源',
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3',
            },
          },
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true,
        },
        xAxis: [
          {
            boundaryGap: false,
          },
        ],
        yAxis: [
          {
            type: 'value',
          },
        ],
      },
    }
  },
  created() {},
  async mounted() {
    // 初始化图标，只有被挂载了才说明DOM已经被渲染完毕了
    var myChart = echarts.init(document.getElementById('main'))
    // 发起数据请求
    const { data: res } = await this.$http.get('reports/type/1')
    if (res.meta.status !== 200) {
      return this.$message.error('报表数据获取失败！')
    } else {
        // 使用lodash把接口文档中提供的数据和从服务器中获取到的数据进行合并形成一个完成的对象供echarts做渲染
        const result= _.merge(res.data,this.options)
        // 展示数据
        myChart.setOption(result)
    }
  },
  methods: {},
}
</script>

<style lang="less">
</style>